Well Mr. Towle, if you're right, and I totally bow out to you when it comes to identifying cards, that would mean I was wrong
Well, there's a first time for everything, I suppose

Not afraid to own up to it
Still, I would feel more comfortable with your analysis if you actually had the chance to see the collection in person.
One of the reasons I deemed this to be a fake was because I had asked the seller for at least one scan, but was ignored. Since you have some scans, you can see much better than the bidders.
When you say
most are the real deal, it makes me wonder what you think
aren't the real deal. Anyway a good score for the new owner and I'm sure he's in good hands as you will make his options known to him without bias.
Would he be willing to remove one card and send it in for grading?
After all, the backs can be just as interesting as the fronts with these collections.
T